There was a guy who cheated on his wife/girlfriend with another guy in their house. She catches them and instead of making him leave, she punishes him by giving him an ultimatum that if he doesn't orgasm from being fucked by this guy (for a certain length of time i.e 5 mins, but can't remember), then she will stay with him, if he orgasms, then she will leave him. I'm sorry that's about all I can remember!